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... Chapter 2.
5. A piece of communication equipment has two stages of amplification with gains of 40
and 60 and two loss stages with attenuation factor of 0.03 and 0.075. The output voltage
is 2.2 V. What are the overall gain (or attenuation) and the input voltage?
21. What circuit Q is required to giv ...

... FM frequencies around 100 MHz)
• TV antenna (VHF frequencies are around 100 MHz,
on either side of FM frequencies, UHF frequencies
around 500 MHz)
These are public transmissions, and so the carrier
frequencies are set and regulated
• Coaxial cable
These are private
• Optical waveguides
transmissions ...

... quantities that are often the inputs and outputs that are being monitored, operated on, and
controlled by a system. Digital signals are often an approximation of the analog data (like
voice or video) that is obtained through a process called quantisation. The digital
representation is never the exac ...

HD-MAC

HD-MAC was a proposed broadcast television systems standard by the European Commission in 1986 (MAC standard), a part of Eureka 95 project. It was an early attempt by the EEC to provide High-definition television (HDTV) in Europe. It was a complex mix of analogue signal (Multiplexed Analogue Components), multiplexed with digital sound, and assistance data for decoding (DATV). The video signal (1250 (1152 visible) lines/50 fields per second in 16:9 aspect ratio) was encoded with a modified D2-MAC encoder. HD-MAC could be decoded by a standard D2-MAC receivers (SDTV), but in that mode only 625 (576) lines and certain artifacts were visible. To decode the signal in full resolution required a specific HD-MAC tuner.